Every chef knows that the magic of cooking depends on the size of the dose – too much salt or not enough lemon can make the difference between the most delicious meal and an awful meal. So it is with everything in life, from how much we eat and drink, to how often we exercise, how much sleep we get, and how much time we expend on other activities. The correct dose is different for each of us – it is up to us to find the correct dose to make the magic happen in our lives.